Patent application number | Description | Published |
20090072157 | METHOD OF MANUFACTURING A RADIATION DETECTOR - In a method of manufacturing a radiation detector according to this invention, a lattice frame | 03-19-2009 |
20090097613 | NUCLEAR MEDICAL DIAGNOSIS DEVICE - A nuclear medical diagnostic device, for determining parameters T | 04-16-2009 |
20090242774 | RADIATION DETECTOR - A problem of local pin-hole defects generated in avalanche multiplication is avoided. Before an anode and a cathode are assembled as a light receiving element, a position of a pin-hole defect is specified by a vacuum container for specifying a defect position having a previously prepared field emission array for inspection. If the cathode is a field emission array when the anode and cathode are assembled as a light receiving element, the anode and cathode are assembled such that a field emission chip corresponding to the position of the pin-hole defect does not discharge an electron beam to the field emission array serving as an actual detector. | 10-01-2009 |
20090310735 | NUCLEAR MEDICAL DIAGNOSTIC DEVICE - By simultaneously administering a chemical using a nuclear species releasing a single photon (a first chemical) and another chemical using a nuclear species releasing a positron to a subject, the cumulative distributions of the respective chemicals are monitored. A plural number of γ-ray detectors, which are circularly located, and a collimator covering some of the γ-ray detectors and rotates along the front face of the γ-ray detectors are provided. Also, an energy discriminating means for discriminating signals having a single photon γ-ray energy (first signals) from signals having annihilation γ-ray energy (second signals) among all of the signals detected by the detectors is provided. Further, the cumulative position of the first chemical is specified based on the signals corresponding to the γ-ray detectors covered with the rotating collimator from the first signals. On the other hand, the cumulative position of the second chemical is specified by determining the signal almost simultaneously observed form the second signals and the positions thereof on the detectors. | 12-17-2009 |
20100006781 | HOLLOW GRID AND MANUFACTURING METHOD THEREOF - A hollow grid that can be manufactured easily, capable of inhibiting the generation of moire fringes, and absorbing less transmitted X-rays is provided. The hollow grid uses no intermediate material that is capable of transmitting the X-rays. X-ray shielding members are located at intervals of an integral multiple of a pixel pitch of a two-dimensional radiation detector. The X-ray shielding members are held by adhering to the upper and lower wrapping members. Therefore, through a sensitivity correction, the structure, in which the generation of moire fringe is difficult, is provided. Since the hollow grid is assembled by means of an assembling jig, the intervals of the X-ray shielding members can be formed easily with high precision. The quality variation of the completed hollow grids is small, and the product precision is high. | 01-14-2010 |
20100127179 | NUCLEAR MEDICAL DIAGNOSTIC DEVICE - Parameters T | 05-27-2010 |
20100237251 | RADIATION DETECTOR - A thin radiation detector with a high sensitivity is described. The radiation detector has light receiving elements receiving lights emitted by scintillators, performs a photoelectric conversion by using an avalanche multiplication film formed by amorphous selenium, and reads signals by using electron beams constantly discharged from a plurality of electron beam emitting sources called as a field emission array. The avalanche multiplication film formed by amorphous selenium is quite thin and has a simple structure, so it can be formed compactly and realized at a low cost. In addition, a signal amplification degree is approximately 1000 times, so an expensive low noise amplifier or a dedicated temperature adjusting mechanism is not required, and a quantum efficiency is sufficient for a wavelength of 300˜400 nm. | 09-23-2010 |
20110056063 | RADIATION TOMOGRAPHY APPARATUS AND METHOD OF MANUFACTURING THE SAME - A method of manufacturing radiation tomography apparatus according to this invention includes a first spacer joining step of joining a spacer to a radiation detector, and a second spacer joining step of joining both the radiation detectors to each other via the spacer such that clearance between adjacent scintillators corresponds to integral multiples of an arrangement pitch of scintillation counter crystal. Accordingly, the scintillators provided in the radiation tomography apparatus of this invention are arranged more regularly, which achieves enhanced spatial resolution of the radiation tomography apparatus. | 03-10-2011 |
20110099790 | MANUFACTURING METHOD OF SCATTERED RADIATION REMOVING GRID - The invention includes disposing guide slit plate mechanisms fixed relative to one another, namely, parallel to and spaced apart from one another by a prescribed distance; fitting metal foils, which serve as X-ray absorbing substance provided between the guide slit plate mechanisms, parallel to primary X-rays; inserting both ends of the metal foils into the guide slit plate mechanisms; inserting, when applying tension evenly, a rod, which is sheathed in an elastic body, into holes formed in the metal foils on the tip sides of the metal foils beyond the inserted portions; and adopting a structure that ensures that the cross sectional shape of the elastic body sheathing the rod has a sufficient wall thickness in a direction in which the elastic body is compressed when tension is generated, and thereby eliminating any difference in the tension even if a spring constant k that is determined during compression is small and the amounts of compression are different. | 05-05-2011 |
20110238354 | RADIATION IMAGING DEVICE - Correction by moire elimination is carried out with high precision in an environment where relative misalignment among the focal point, the grid, and the X-ray flat panel detector may occur. A part of each of two signal regions of interest is masked by an X-ray plate, and an operation value Rf=(Sx−Sy)/(Sx+Sy) is defined for signal values Sx and Sy obtained from the masked portions. By associating the operation value Rf with the relative position relationship, the relative position relationship is obtained from the operation value Rf, and a correction parameter for the relationship is used. | 09-29-2011 |
20130108016 | RADIOGRAPHIC APPARATUS FOR BREAST EXAMINATION | 05-02-2013 |